使用gem postgis_adapter

Question

添加多邊形？

local = Local.new(:geom => **Polygon('-71.1776585052917 42.3902909739571,-71.1776820268866 42.3903701743239,-71.1776063012595 42.3903825660754')**)

錯誤：語法錯誤，意想不到的tFLOAT，期待 '>'

Answer 1

構建多邊形：

Polygon.from_coordinates([[[-71.1776585052917,42.3902909739571],[-71.1776820268866,42.3903701743239],[-71.1776063012595,42.3903825660754],[-71.1776585052917,42.3902909739571]]], 4326) 

確保外部線性環閉合（即三角形有四個點）。我還設置了SRID = 4326，這是您使用WGS 84的猜測。